MELVYL CATALOG DATABASE TELNET STATISTICS
Time period: 03/17/01 through 03/23/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 991 2,773 3,764
Davis 1,822 202 2,024
Irvine 800 0 800
Los Angeles 88 534 622
Riverside 565 116 681
San Diego 385 214 599
San Francisco 302 0 302
Santa Barbara 250 211 461
Santa Cruz 241 205 446
LBL 0 132 132
LLL 0 104 104
Other - UC 21 271 292
CSL 0 157 157
CSU n/a 167 167
Other-Non-UC n/a 4,464 4,464
_______ ______ _____
5,465 9,550 15,015
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 269 832 5,276
2-4 a.m. 225 949 9,840
4-6 a.m. 227 743 8,200
6-8 a.m. 436 1,310 12,261
8-10 a.m. 1,937 6,595 46,600
10-12 a.m. 2,930 10,815 79,273
12-2 p.m. 2,783 8,937 68,919
2-4 p.m. 2,868 9,162 68,222
4-6 p.m. 1,738 4,843 37,792
6-8 p.m. 681 1,909 14,612
8-10 p.m. 556 1,739 13,766
10-12 p.m. 365 1,047 9,750
__________ __________ __________ _________________
Total: 15,015 48,881 374,511
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 2,721 7,959 10,680
Davis 5,937 694 6,631
Irvine 2,703 0 2,703
Los Angeles 228 1,264 1,492
Riverside 1,952 316 2,268
San Diego 1,177 421 1,598
San Francisco 495 0 495
Santa Barbara 830 725 1,555
Santa Cruz 1,610 761 2,371
LBL 0 164 164
LLL 0 443 443
Other - UC 20 736 756
CSL 0 461 461
CSU n/a 531 531
Other-Non-UC n/a 16,733 16,733
_______ ______ _____
17,673 31,208 48,881
1.3 Records Displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 21,139 58,093 79,232
Davis 39,056 3,347 42,403
Irvine 17,961 0 17,961
Los Angeles 2,035 8,431 10,466
Riverside 15,439 2,368 17,807
San Diego 7,056 3,692 10,748
San Francisco 4,664 0 4,664
Santa Barbara 7,138 4,392 11,530
Santa Cruz 7,367 4,630 11,997
LBL 0 1,616 1,616
LLL 0 5,407 5,407
Other - UC 105 5,166 5,271
CSL 0 2,559 2,559
CSU n/a 6,858 6,858
Other-Non-UC n/a 145,992 145,992
_______ ______ _____
121,960 252,551 374,511
1.4 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.6
Standard deviation in seconds 2.8
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.3
Standard deviation in seconds 0.9
2.0 COMMAND mode statistics:
____________________________
Median session length (minutes:seconds) 9:01
Average session length (minutes:seconds) 13:24
Longest session recorded (minutes:seconds) 877:15
Average number of searches completed per session 3.2
Retrievals per search - median 2.0
Retrievals per search - average 63.6
Retrievals per search - standard deviation 933.9
Percent of searches completed with 0 results 27.5%
Percent of searches entered that are long 3.8%
Percent of long searches completed
(includes partial results) 61.9%
Commands entered, by type, excluding errors:
Total Percentage
FIND 47,257 35.3%
DISPLAY (excluding automatic displays) 43,774 32.7%
ACFIND 21 0.0%
BROWSE 257 0.2%
SELECT 166 0.1%
HELP 1,000 0.7%
EXPLAIN 1,083 0.8%
SET/RESET 3,838 2.9%
SHOW 293 0.2%
AT 2,778 2.1%
ADD ON (AND, OR, AND NOT) 1,590 1.2%
LOGON or LOGOFF 23,973 17.9%
COMMENT 0 0.0%
SAVE 877 0.7%
USE 1,010 0.8%
OTHER 5,852 4.4%
FINDs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
PERSONAL AUTH 7,956 16.0% 1,945 24.4% 10 66.1 236.8
AUTHOR 1,786 3.6% 497 27.8% 12 114.0 399.3
CORPORATE AUTH 644 1.3% 255 39.6% 22 521.6 1775.5
EXACT CA 16 0.0% 4 25.0% 40 317.7 620.0
TITLE WORD 11,808 23.7% 3,694 31.3% 4 50.2 693.3
EXACT TITLE 7,736 15.6% 2,223 28.7% 2 19.3 122.0
TITLE -> TW 1,169 2.4% 297 25.4% 8 57.2 255.5
TITLE -> XT 1,522 3.1% 754 49.5% 1 12.8 121.4
SUBJECT 2,556 5.1% 938 36.7% 41 392.9 2075.2
EXACT SUBJECT 160 0.3% 42 26.2% 65 560.0 1162.2
PERIODICAL 8,582 17.3% 1,767 20.6% 4 91.5 1728.0
EXACT PE 2,630 5.3% 396 15.1% 3 34.0 520.6
RPE 2 0.0% 0 0.0% 4 4.0 1.4
XRP 0 0.0% 0 0.0% 0 0.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
LANGUAGE 85 0.2% 14 16.5% 56 301.2 862.3
DATE 638 1.3% 174 27.3% 4 59.8 322.1
FORM 604 1.2% 122 20.2% 20 345.3 2840.3
NUMBER* 16 0.0% 13 81.3% 2 1.7 0.6
MUSIC* 32 0.1% 16 50.0% 933 750.0 809.2
SERIES 1,097 2.2% 392 35.7% 3 68.4 262.6
UNIFORM TITLE 16 0.0% 4 25.0% 93 413.8 705.1
Other indexes 684 1.4% 290 42.4% 1 14.3 58.5
* Number indexes include REPORT NUMBER STOCK NUMBER,
GOVERNMENT DOCUMENTS, and GPO ITEM NUMBER;
Music indexes include MUSICAL KEY, MUSIC PUBLISHER, and THEMATIC
By number of indexes:
Multiple 3,032 6.5% 903 29.8% 4 60.6 344.0
Single 43,519 93.5% 11,995 27.6% 5 86.9 1094.2
BROWSEs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. BROs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
PERSONAL AUTH 10 4.4% 2 20.0% 8 13.5 14.7
CORPORATE AUTH 4 1.7% 2 50.0% 224 224.0 134.4
EXACT CA 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 189 82.5% 36 19.0% 49 156.4 476.5
EXACT SUBJECT 24 10.5% 5 20.8% 9 193.0 586.9
UNIFORM TITLE 0 0.0% 0 0.0% 0 0.0 0.0
SERIES 2 0.9% 0 0.0% 109 109.0 127.3
By number of indexes:
Multiple 1 0.4% 0 0.0% 464 464.0 0.0
Single 243 99.6% 51 21.0% 36 144.8 462.8
DISPLAY commands, by type, excluding automatic displays:
REVIEW 11.5%
BRIEF 66.0%
LONG 11.8%
MARC 3.0%
FIELDS 2.8%
TAG 2.4%
PERIODICALS 0.0%
COMMENTS 0.0%
Other (includes BROWSE, ACFIND) 2.4%
3.0 Error, EXPLAIN and HELP statistics
__________________________________________________________
Percent of commands that contained errors 7.5%
Ten most frequent errors:
1. NS command - no next screen 29.6%
2. First word of command is invalid 26.5%
3. FIND command with invalid index name 11.9%
4. DISPLAY command contains invalid word 4.9%
5. Search term missing from search command 2.6%
6. PS command - no previous screen 2.4%
7. Max. # of ports to a Z39 db are in use 2.2%
8. KW search in database w/o KW index 2.2%
9. Valid command at an inappropriate time 1.5%
10. DISPLAY command - no FIND results 1.5%
11. All others 14.7%
Ten most frequent EXPLAIN requests:
1. GUIDE 22.8%
2. FIND 13.8%
3. INDEXES 9.1%
4. COMMAND WORDS 6.3%
5. Unrecognized term 5.2%
6. PASSWORDS 3.5%
7. DISPLAY 3.0%
8. DATABASES 2.5%
9. CATALOG 2.0%
10. ADD-ON SEARCH 1.6%
11. All others 30.3%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 21.7%
2. First word of command is invalid 13.0%
3. FIND command with invalid index name 13.0%
4. DISPLAY command - middle of >1 screen 5.2%
5. NS command - no next screen 3.2%
6. FIND command retrieves >1 book 3.0%
7. DISPLAY command-first of >1 screen 3.0%
8. Help requested from SET DB command 2.2%
9. DISPLAY command-complete in one screen 2.0%
10. TW search with zero results 1.8%
11. All others 31.8%
Ten most frequent SHOW requests:
1. HISTORY 50.5%
2. SEARCH 15.1%
3. GLOSSARY 10.0%
4. SETTINGS 7.2%
5. SYSTEM NEWS 2.4%
6. SYSTEMS INFORMATION 1.7%
7. MAIL STATUS 1.4%
8. DISPLAY 1.0%
9. LOCATION 0.7%
10. UCB LIBRARY HOURS 0.7%
11. All others 9.3%
CATmm/dd cat MELVYL CATALOG DATABASE TELNET STATISTICS (weekly)